Accuracy engineered mechanical stopwatch ensures minimal timing errors with a stainless steel spring, 13 jewelry movement, and shock resistant design for efficient sports chronograph Combines classical mechanical durability with modern splashes resistant protections, featuring glowing markers for low light readability in critical sports scenario Used by trainers, referees, and athletes for professional track event requiring handheld stopwatch accuracy Features a manual start / stop mechanism, 30 / 60 second dials with high contrust pointers, and operates flawlessly in 10°C to 40°C environment without batteries Ideal for timing sprints, races, and training drills during outdoor competitions or indoor gym tasks